Attraction

By using the letter of the given word, 'COMMUNICATION'
'UNISON' is the only word which cannot be formed due to the absence of letter 'S' in word 'COMMUNICATION' .

From the given word INTERVENTION ,
'ENTERTAIN' is the only word which can not be formed due to the absence of letter 'A' in given word INTERVENTION .

From the given word PORTFOLIO ,
'PORTICO' is the only word which cannot be formed due to absence of letter 'C'.

From the given word, 'CHANGE' is the only word which cannot be form due to the absence of letter 'G' in MERCHANDISE

From the given word, 'TUTOR' is the only word which can be formed.

By using the letters of the given word Workshop
'Crow' is the only word which cannot be formed due to the absence of letter 'C'.

By using the letters of the given word 'Reasonable ',
'Brain' is the only word which cannot be formed due to the absence of letter 'i'.

Only 'MENTOR' is the word which cannot be formed due to absence of letter 'O'.

The word which cannot be formed from 'SPECIFICATION' is 'FAINTING', because 'G' is not present in given word.

Let us assume the ages of A and B be 3x and 11x years; then
After 3 years the ages of A and B will be 3x + 3 and 11x + 3.
According to question,
After 3 years the ratio of the ages becomes 1: 3,
(3x + 3)/(11x + 3) = 1/3
? 3 (3x + 3) = 1 (11x + 3)
? 9x + 9 = 11x + 3
? 2x = 6
? x = 3
Hence, their present age, 3x = 3 x 3 = 9 years; 11x = 11 x 3 =33 years