Question: What is an efficient way to find counts for a category of a categorical variable, such as M for Gender? a . Replace each M

What is an efficient way to find counts for a category of a categorical variable, such as M for Gender?
a. Replace each M with a 1 and all other values with a 0, then sum the 0s and 1s
b. Replace each M with a 1 and all other values with a 0, then average the 0s and 1s
c. Replace each M with a 0 and all other values with a 1, then sum the 0s and 1s
d. Replace each M with a 0 and all other values with a 1, then average the 0s and 1s

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