In LISP, the function returns t if is a CONS cell and nil otherwise: A. (cons) B. (consp) C. (eq) D. (cous =) E. None of the above

The correct answer is B. (consp)

(consp) is a function in Lisp that returns t if its argument is a cons cell and nil otherwise. A cons cell is a special type of data structure in Lisp that consists of two parts: a car and a cdr. The car is the first element of the cons cell, and the cdr is the rest of the cons cell.

The following are examples of cons cells:

(cons 1 2)

(cons ‘a ‘b)

(cons ‘(1 2 3) ‘(4 5 6))

The following are examples of objects that are not cons cells:

1

‘a

(1 2 3)

(4 5 6)

To test whether an object is a

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