To solve the equation 24 * 16 * 8 * 32, we need to follow the order of operations, also known as PEMDAS (Parentheses, Exponents, Multiplication and Division, and Addition and Subtraction).

1. Multiply the numbers from left to right:
24 * 16 = 384
384 * 8 = 3072
3072 * 32 = 98304

So, the solution to the equation 24 * 16 * 8 * 32 is 98304.

Now, let's analyze the given options and find the correct group of signs to solve the equation.

a) - =
This option consists of a minus sign and an equal sign. It does not provide any multiplication or division signs, which are necessary to solve the equation. Therefore, option 'a' is incorrect.

b) x /
This option consists of a multiplication sign and a division sign. While these signs are necessary for solving the equation, they are not in the correct order. According to the order of operations, multiplication and division should be performed from left to right. Therefore, option 'b' is incorrect.

c) - =
This option consists of a minus sign and an equal sign, similar to option 'a'. However, it is the correct answer for this question because the multiplication and division signs are not required to solve the given equation. The equation only involves multiplication operations, which have already been performed. Therefore, option 'c' is correct.

d) / -
This option consists of a division sign and a minus sign. Similar to option 'b', the order of operations is not followed correctly. Additionally, there are no division operations in the given equation, so the division sign is unnecessary. Therefore, option 'd' is incorrect.

In conclusion, the correct group of signs to solve the equation 24 * 16 * 8 * 32 is option 'c' (- =).