$$119^2-111^2$$​ is a/an:

Correct option is D

Given: 

119² - 111²

Concept Used:

A composite number is a positive integer that has at least one divisor other than 1 and itself.

Solution:

119² - 111² = (119 + 111)(119 - 111) = (230)(8) = 1840

​1840 has factors other than 1 and itself. For example, 2, 4, 5, 8, etc.

Since, 1840 has multiple divisors, it is a composite number.

Option (d) is right answer.