In RNA of humans, adenine pairs

Select the most appropriate meaning of the given idiom. 

On the double

Select the most appropriate ANTONYM of the given word.

Seize

Most of the children, who are caught illegally trying to enter into [A] / enter [B] India from across the border / are sent to the juvenile home

Select the most appropriate meaning of the given idiom.

Herculean task

Forgetfulness can be no reason or it should be the most contagious [A]/ contiguous [B] of ailments.

Select the most appropriate synonym of the given word.

ENTANGLE

Select the most appropriate option to improve the bold segment in the given sentence.If there is no need to improvement it,select, no improvement.

You can ____________ interest rates on post office schemes to be ___________ in the next one year, if the rate upcycle continues.