Which of the following statements about financial ratio analysis is not correct?

Comparative analysis is to examine the financlal ratlos of a partlcular firm against the same measures for a group of firms from the same industry, at a point in time

Profit margin $($PM$),$ return on assets $($ROA$),$ and return on equity $($ROE$)$ are the most used asset management ratios.

Other things held constant, very successful firms such as Coca Cola, Microsoft, and Citibank will have a high market$-$to$-$book value ratio.

Liquidity ratios show the relationship of a firm's current assets to its current liabilities. Current ratio and quick ratio are the most used liquidity ratios.