The correct answer is A. Enstallment.
The correct spelling of the word is "installment".
An installment is a payment made on a loan or other debt, typically one of a series of equal payments.
The word "enstallment" is not a real word. It is a misspelling of the word "installment".
The words "innocence", "impetus", and "incipient" are all spelled correctly.
Innocence is the state of being free from guilt or sin.
Impetus is a force or stimulus that causes something to happen or continue happening.
Incipient is beginning to develop or appear.
