[" maximum number of points into which "4" circles and "4" straight lines intersect,is "(a)26" (b) "50" (c) "50" ? "(4)" ? "],[" an that "n" is odd the number of ways in which three numbers in "A" .P.can be selected from "1,2,3,4,..." n "1" is "],[(n-1)^(2)/2],[" number of four-letter words can be formed using the letter of the word in INEFECTIVE' "?" (d) NOT."]