$2-$ Suppose you are given a method named equal that takes an integer arraylist $x$ as input parameter and returns true if arraylist contains same number of positive and negative elements, false otherwise. Which of the following is the correct statement to call equal method.

a$)$ boolean result$=$equal$($ArrayList $x$;

b$)$ boolean result$=$equal$(x$;

c$)$ int result$=$equal$($ArrayList $x$;

d$)$ int result$=$equal$($x$)$;

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