The odd man out from the given alternatives is option 'C' - warm : cold.

Explanation:
The given alternatives consist of pairs of words. In each pair, one word is the opposite or contrasting term of the other. We need to identify the pair in which the words are not opposites of each other.

a) love : hate
Love and hate are antonyms, representing opposite emotions. Love is a positive feeling, while hate is a negative feeling. Therefore, this pair is not the odd one out.

b) anger : calm
Anger and calm are contrasting emotions. Anger represents a strong feeling of displeasure or rage, while calm represents a state of tranquility or peacefulness. This pair is not the odd one out.

c) warm : cold
Warm and cold are antonyms, representing opposite temperatures. Warm refers to a high temperature, while cold refers to a low temperature. This pair is the odd one out because the words are antonyms, just like the other pairs.

d) pride : humility
Pride and humility are contrasting qualities. Pride refers to a feeling of satisfaction or self-worth, often associated with arrogance or superiority. Humility, on the other hand, refers to a modest or humble nature. This pair is not the odd one out.

e) success : failure
Success and failure are antonyms, representing opposite outcomes or results. Success signifies the accomplishment of a goal or the attainment of a positive outcome, while failure represents the lack of success or the occurrence of a negative outcome. This pair is not the odd one out.

Therefore, the odd man out from the given alternatives is option 'C' - warm : cold.