Meaning of "Akin to"

[mohammad.]

English Idioms and Expressions, Elementary Level

ESL/EFL Test #7 "All Agog", question 7

There are no two ways about it because the crime that has been committed is really akin to murder.

(a) keen on
(b) good to
(c) similar to
(d) different to

English Idioms and Expressions, Elementary Level

ESL/EFL Test #7 "All Agog", answer 7

There are no two ways about it because the crime that has been committed is really similar to murder.

Correct answer: (c) similar to
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i`d like to have your explanation

mohammad

[Mister Micawber]

Akin to = similar to, related to
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Native English teacher at Mister Micawber's