Flourine is related to Halogen in the same way as Helium is related to _________.

Select the number that is related to the third number in the same way as the second number is related to the first number.

$$12: 36:: 18: \text { ? }$$

Select the word-pair in which the two words are related in the same way as are the two words in the following word-pair.

Growth : Expansion

Select the option in which the numbers are related in the same way as are the numbers of the following set.

$$29: 36: 39$$