Explanation:

Deputy Prime Minister of India:
The position of Deputy Prime Minister in India is not a constitutional post but rather a political appointment. The Deputy Prime Minister is usually a senior member of the ruling party or coalition and is appointed by the Prime Minister.

Options:
a) Devi Lal
b) GL Nanda
c) LK Advani
d) YB Chavan

Devi Lal:
Devi Lal, also known as Chaudhary Devi Lal, was a prominent Indian politician who served as the Deputy Prime Minister of India from 1989 to 1991 under Prime Minister V.P. Singh. He belonged to the Janata Dal party and was a key figure in Indian politics, particularly in the state of Haryana.

GL Nanda:
GL Nanda, also known as Gulzarilal Nanda, was an Indian politician who served as the interim Prime Minister of India twice - first in 1964 following the death of Prime Minister Jawaharlal Nehru, and again in 1966 after the death of Prime Minister Lal Bahadur Shastri. However, he never served as the Deputy Prime Minister of India. Hence, option B is correct.

LK Advani:
LK Advani is a prominent Indian politician who has served as a Member of Parliament and held various ministerial positions in the Indian government. He was also one of the key leaders of the Bharatiya Janata Party (BJP). However, he never held the position of Deputy Prime Minister.

YB Chavan:
YB Chavan, also known as Yeshwantrao Balwantrao Chavan, was an Indian politician and statesman. He served as the Deputy Prime Minister of India from 1979 to 1980 under Prime Minister Charan Singh. Chavan was a member of the Indian National Congress and played a significant role in shaping India's political landscape.

Conclusion:
Out of the given options, GL Nanda was the one who never served as the Deputy Prime Minister of India.