Step 1: Understand the question.
We need the present Chairman of Tata Trusts. Tata Trusts is the charitable arm linked to the Tata Group, so this is a current-affairs leadership question.
Step 2: Separate the roles inside the Tata world.
The Tata Group has many parts. Tata Sons is the main holding company, while Tata Trusts are the charity trusts that own a big share of Tata Sons. Each part has its own leader, so we must not mix them up.
Step 3: Check the people in the options.
N Chandrasekaran leads Tata Sons as its Chairman, not the Trusts. Shantanu Naidu is a young manager known for working closely with Ratan Tata. These do not fit the Trust chairman role.
Step 4: Note the recent change.
Ratan Tata, who chaired the Trusts for many years, passed away. After him the leadership of Tata Trusts moved to a senior family member.
Step 5: Identify the new Chairman.
Noel Tata, the half-brother of Ratan Tata, was named the Chairman of Tata Trusts. So the current head is Noel Tata.
Step 6: Match with the options.
The fourth option matches.
\[ \boxed{\text{Noel Tata}} \]