If it is possible to make a meaningful word with the fourth, the seventh, the eleventh and the thirteenth letters of the word 'CATEGORISATION' which of the following will be the first letter of that word ? If no such word can be made, give X as the answer. If more than one such word can be made, give M as the answer.
In following number series, two terms have been put within brackets. Choose the appropriate option - Look at this series: 40, 40, 47, 47, 54, . . . What number should come next?