Which of the following makes a coract sentence from the given words and phrases? Circle the best option {A, B, C or D}

Ex1. Which of the following makes a coract sentence from the given words and phrases?Circle the best option{A,B,C,orD}
1   I/think/mountain climbing/ challenging/ collecting thinhs.
A.I think about mountain climbing is as challenging as collecting things.
B.I think mountain climbing as chllenging as chollecting things.
C.I think mountain climbing is more challenging than collecting things.
D.I think mountai climbing is more challenging than collecting thing.
2   I/love/outdoors/trees / flowers
A.I love outdoors with trees and flowers.
B.I would love be outdoors with trees and flowers. 
C.I will love to be outdoors with trees and flowers.
D.Ilove being outdoors with trees and flowers
Ex2. Circle the word whose underlined past is pronounced differently from otheers in the group.
1. A.wave        B.leave        C.relieve        D.relief
2. A.belief         B.off            C.of               D.laef