A language with string manipulation facilities uses the following operations.
head(s)- returns the first character of the string s
tail(s)- returns all but the first character of the string s
concat(sl, s2)- concatenates string s1 with s2.
The output of concat(head(s), head(tail(tail(s)))), where s is acbc is
(A)
ab
(B)
ba
(C)
ac
(D)
as
Answer: (A)
Explanation:
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