Correct option (A) 7
In ‘DEGREE’ we have three E’s and D, G, R.
Four letters can be selected in following ways:
(i) Three alike, one different letter 3C1 x 3C3
(ii) Two alike, two different letters 3C2
(iii) All different letters 3C3
(iv) Total number of ways = 3C1 + 3C2 + 3C3 = 7