Solution:

This quite an easy question and the answer is Rachel.

Since she is in the room, she is also a primate and being human, she is the smartest of all.

Solution:

Start singing the Happy Birthday song and the lion will run towards the candle and blow it.

Solution:

Adam and Eve were the only people without navel. As they were not born out of a mother, they never had umbilical cords and thus never had navels.

Solution:

Unquestionably

Solution:

I an oxford dictionary where "arcade" comes before "because", because "because" begins with "B".

Solution:

Accelerate

Solution:

An autobiography

Solution:

A parachute that didn't open.

Solution:

They are numbers for houses and it's Rs.100 per digit.

Solution:

It is called harmony. The reason is simple. The husband receives peace after giving that money to his wife.