Direction: Four words are given, out of which only one word is spelt correctly. Choose the correctly spelt word.

Two circle C1 and C2 touch each other internally at P. Two lines PCA and PDB meet the circles C1 in C, D and C2 in A, B respectively. If ∠BDC = 120^o, then the value of ∠ABP is equal to -

In the triangle ABC, AB = 2 cm, BC = 3 cm and AC = 4 cm. D is the middle point of AC. If a square is constructed on the side BC, what is the area of the square?

The average of nine numbers is 50. The average of first five numbers is 54 and that of the last three numbers is 52, then the sixth number is -

The difference between compound interest and simple interest on a sum of money for 3 years at 8% per annum is Rs. 354.80. Find the sum.

The ratio between the monthly income of A, B and C is 2 : 3 : 5. If C's monthly income is Rs. 1500 more than the A's monthly income, then find the B's annual income.

Select the related letter/ word/ number/ figure from the given alternatives.
453 : 17 : : 663 : ?

A word is given in capital letters, it is followed by four words. Out of these four words the three words cannot be formed from the letters of the word in capital letters. Point out the word which cannot be formed from the letters of the given word in capital letters.
GASTROENTEROLOGIST