In the following figure, rectangle represents Pharmacists, circle represents Bloggers, triangle represents Trekkers and square represents Gymnasts. Which set of letters represents Gymnasts who are not Bloggers?
Present age of Ashok is twice the present age of Kishan. After 7 years the Kishan’s age will be 4 times of the Kartik’s present age. If Kartik celebrated his 9th birthday 3 years ago, then what will be the present age (in years) of Ashok?