1. 

Select the correct combination of mathematical signs to replace '★' signs and to balance the following equation.

6 ★ 4 ★ 12 ★ 12

A. ÷, -, =
B. +, -, ÷
C. =, -, ÷
D. x, - , =

Answer: Option D

Explanation:

6 ★ 4 ★ 12 ★ 12

From option (D), 6 x 4 - 12 = 12  12 = 12