1. If we take the product $HD$, we can see that the market share of $HD$ has been fallen in Bombay, Calcutta & Delhi between $93-94$.
So, the $1^{st}$ option is wrong.
2. If we take the product $CO$, the market share of product $CO$ is decreased in Calcutta, Delhi & Madras.
So, the $2^{nd}$ option also didn't satisfy the criteria.
3. Now, the product $BN$, $BN's$ market share also been decreased in Bombay in 93-94.
So, all the three options are rejected.
The answer will be $\color{green}{\text{Option D)}}$ $\color{red}{\text{None of these}}$