Answer:
Only the interest amount received is taxable.
Step-by-step explanation:
CMO refers to Collateralised Mortgage Operation in this whenever one receives a payment it is joint of some principal and remaining amount as an interest.
The principal received only decreases the debt, that is created in a CMO. Thus, is not to be considered as an income in any manner.
Interest received is a part of income as do not decrease the liability of debt, rather increases the revenue, and is therefore, taxable.