To know who said the quote, "Climbing to the top demands strength, whether it is to the top of Mount Everest or to the top of your career," the user needs to be aware of the famous personalities who have made such statements.

Here are the options and their respective identities:

A. C V Raman - C V Raman was an Indian physicist who was awarded the Nobel Prize in Physics in 1930 for his work on the scattering of light and the discovery of the Raman Effect. However, he is not known to have made the above statement.

B. Homi Bhabha - Homi Bhabha was an Indian nuclear physicist who played a major role in the development of India’s nuclear program. However, he is not known to have made the above statement.

C. A P J Abdul Kalam - A P J Abdul Kalam was an Indian aerospace scientist and politician who served as the President of India from 2002 to 2007. He was known for his inspirational speeches and quotes, including the one mentioned in the question. Therefore, option C is the correct answer.

D. Hargovind Khurana - Hargovind Khurana was an Indian-American biochemist who was awarded the Nobel Prize in Medicine in 1968 for his work on the interpretation of the genetic code and its function in protein synthesis. However, he is not known to have made the above statement.

The Answer is: C. A P J Abdul Kalam