Explanation:

- Option 1: Shah Rukh Khan

- Shah Rukh Khan is a globally renowned Indian actor known for his work in Bollywood.

- He is often celebrated for his roles in romantic and drama films.

- However, he did not receive the 'Best Actor' award at the Indo-German Film Week in 2020.

- Option 2: Adil Hussain

- Adil Hussain is an acclaimed Indian actor known for his versatile performances in Indian and international films.

- He was honoured with the 'Best Actor' award at the Indo-German Film Week in 2020.

- His performances are often noted for their depth and nuance.

- Option 3: Salman Khan

- Salman Khan is one of Bollywood’s leading actors, known for his work in action and drama films.

- Despite his popularity, he was not recognized with the 'Best Actor' award at this event in 2020.

- Option 4: Sanjay Dutt

- Sanjay Dutt is a well-established actor in the Indian film industry, famous for his roles in action and drama genres.

- He did not win the 'Best Actor' award at the Indo-German Film Week in 2020.