Reasoning

    Analogy
    Parts : Strap :: Wolf : ? (analogy)
    Analogy
    Botany : Plants (analogy)
    First is the branch of science which deals with the study of second.
    Analogy
    Rehearsal : Performance (analogy)
    First is followed by the second.
    Odd Man Out
    Find the odd man out from: 25 – 21, 61 – 12, 44 – 31 & 34 – 30
    25 – 21 = 4 = 22 61 – 12 = 49 = 72 34 – 30 = 4 = 22 44 – 31 = 13 (which is not a square of any number)So, option (C) is the answer.
    Analogy
    Tall : Short :: Treachery : ? (analogy)
    Short is opposite of Tall similarly Loyalty is opposite of Treachery.
    Analogy
    BRISTLE : BRUSH (analogy)
    A bristle is a part of a brush; a key is a part of a piano.
    Odd Man Out
    Find the odd man out from: HJN, JLP, PRU & QSW
    In all other groups, the third letter is four steps ahead of the second letter which, in turn, is two steps ahead of the first letter.
    Analogy
    Lawyer : Court (analogy)
    As the working field of lawyer is Court, similarly the working field of chemist is laboratory.
    Odd Man Out
    Find the odd man out from: Retina, Pupil, Vision & Cornea
    Except Vision, all others are the internal part of an eye.
    Analogy
    Carbon : Diamond :: Corundum : ? (analogy)
    As Diamond is made of Carbon similarly Ruby is made of Corundum.