7 : 48 : : 12 : ?

Gopal said, pointing to Govind “His father is my father's only son ". How is Gopal related to Govind? 

Study the following information carefully and answer the questions given below- A word and number arrangement machine when given an input line of words and numbers rearranges them following a particular rule. The following is an illustration of input and rearrangement. (Single digit numbers are preceded by a zero. All other numbers are two digit numbers)
Input : good 18 to raise 02 12 money 28 for 57 charity 09.
Step I : to good 18 raise 02 12 money 28 for charity 09 57.
Step II : to raise good 18 02 12 money for charity 09 28 57.
Step III : to raise money good 02 12 for charity 09 18 28 57.
Step IV : to raise money good 02 for charity 09 12 18 28 57.
Step V : To raise money good for charity 02 09 12 18 28 57.
Step VI : is the last step of the arrangement of the above input as the intended arrangement is obtained. 

These questions are based on the following input-
Input : always 19 give 21 84 for 62 14 worthy cause.
Which of the following would be step III for the above input?

How many meaningful English words can be made the letters RBAE using each letter only once in each word?

Arrange the following words in a logical and meaningful order.
1.Buy
2.Dinner
3.Market
4.Vegetables
5.Cook

Some equations are solved on the basis of a certain system. Find the correct answer for the unsolved equation on that basis.
33 * 11 * 3 * 6 = 115 

In a class of 30 students, Ankit ranked eighth from the top. There are eight persons between Ram and Ankit. Then what will be the rank of Ram from bottom?

Statement:-
Some trees are flowers.
Some flowers are pencils.
Some pencils are tables.
Conclusion:-
(I) Some tables are flowers
(II) Some pencils are trees
(III) Some tables are trees
(IV) Some trees are pencils