With organolithium and organomagnesium compounds, approach to the carbonyl carbon from the less hindered direction is generally preferred. assuming that this is the case, draw the structure of the major product formed when 4-tert-butylcyclohexanone reacts with phenylmagnesium bromide, followed by treatment with aqueous acid.

trans-4-tert-butyl-1-phenylcyclohexanol  

Explanation:

The bulky tert-butyl group will occupy the equatorial position in the cyclohexanone ring.

It will hinder approach of the Grignard reagent from the bottom side of the molecule.

The reagent will attack from the top, so the product alcohol will be

trans-4-tert-butyl-1-phenylcyclohexanol.

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

the answer is option a.