The word(s) "answer" appears 46 time(s) in 45 verse(s) in Quran in Mohsin Khan translation.

(11) O you who believe! answer Allah (by obeying Him) and (His) Messenger when he (صلى الله عليه وسلم) calls you to that which will give you life, and know that Allah comes in between a person and his heart (i.e. He prevents an evil person to decide anything). And verily to Him you shall (all) be gathered.

(12) Never stand you therein. Verily, the mosque whose foundation was laid from the first day on piety is more worthy that you stand therein (to pray). In it are men who love to clean and to purify themselves. And Allah loves those who make themselves clean and pure [i.e. who clean their private parts with dust (which has the properties of soap) and water from urine and stools, after answering the call of nature].

(13) Was there any town (community) that believed (after seeing the punishment), and its Faith (at that moment) saved it (from the punishment)? (The answer is none) - except the people of Yunus (Jonah); when they believed, We removed from them the torment of disgrace in the life of the (present) world, and permitted them to enjoy for a while.

(14) If then they answer you not, know then that it [the Revelation (this Qur'an)] is sent down with the Knowledge of Allah and that La ilaha illa Huwa: (none has the right to be worshipped but He)! Will you then be Muslims (those who submit in Islam)?

(15) And verily, there came Our messengers to Ibrahim (Abraham) with glad tidings. They said: Salam (greetings or peace!) He answered, Salam (greetings or peace!) and he hastened to entertain them with a roasted calf.

(16) So his Lord answered his invocation and turned away from him their plot. Verily, He is the All-Hearer, the All-Knower.

(17) For Him (Allah, Alone) is the Word of Truth (i.e. none has the right to be worshipped but Allah). And those whom they (polytheists and disbelievers) invoke, answer them no more than one who stretches forth his hand (at the edge of a deep well) for water to reach his mouth, but it reaches him not; and the invocation of the disbelievers is nothing but an error (i.e. of no use).

(18) For those who answered their Lord's Call [believed in the Oneness of Allah and followed His Messenger Muhammad صلى الله عليه و سلم i.e. Islamic Monotheism] is Al-Husna (i.e. Paradise). But those who answered not His Call (disbelieved in the Oneness of Allah and followed not His Messenger Muhammad صلى الله عليه و سلم), if they had all that is in the earth together with its like, they would offer it in order to save themselves (from the torment, but it will be in vain). For them there will be the terrible reckoning. Their dwelling-place will be Hell; and worst indeed is that place for rest.

(19) And warn (O Muhammad صلى الله عليه و سلم) mankind of the Day when the torment will come unto them; then the wrong-doers will say: "Our Lord! Respite us for a little while, we will answer Your Call and follow the Messengers!" (It will be said): "Had you not sworn aforetime that you would not leave (the world for the Hereafter).

(20) On the Day when He will call you, and you will answer (His Call) with (words of) His Praise and Obedience, and you will think that you have stayed (in this world) but a little while!