Three of the following four words are alike in a certain way and one is different. Pick the odd word out.

Find the missing number from the below options.
6    24    96
7    28   112
13   52   ?

Select the related letter/ word/ number/ figure from the given alternatives.
Ado : Mess :: Cheer : ?

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

Select the related letter/ word/ number/ figure from the given alternatives.
FEAR : ui :: BORN : ?

What will come in the place of question mark?
23, 93, 373, 1493, ?

Direction. Study the following information carefully and answer the given below question:
 Alia, Babita, Chandu, Deepika, Esha, Fardeen and Geeta are seven Doctors, visiting a hospital on four days - Tuesday, Wednesday, Friday and Saturday of a week. At least one person must come on a day but not more than two. Each person has a different specialisation-
 HIV, Orthopaedics, Paediatrics, Neurology, Ophthalmology, Radiology and Oncology. Deepika comes with the Radiologist on Friday. The Paediatrician does not come on Saturday and also not with Esha or Geeta. Only the Oncologist comes on Tuesday. Babita comes on Wednesday and is not a Paediatrician. Chandu comes on Wednesday. Geeta is not a Radiologist. The Paediatrician comes with the HIV Specialist. The Neurologist comes on Friday. Alia is neither Specialization in an Orthopaedician nor a Radiologist. Nobady comes with Fardeen. 

What is Deepika's Specialisation?