The following statements are correct :

Common-size balance sheet shows relative value of the various items.

In the common size income statement, each product is represented as a percentage of the Revenue from Operations.

Comparative balance sheet statement shows the increase and decrease in various assets, liabilities and capital in two or more balance sheets of the same business enterprise on different dates

When financial statement figures for two or more years are placed side-by-side to facilitate comparison , these are called comparative analysis.

Both the Statement of Profit and Loss and Statement of Financial Position i.e. Balance Sheet  are used for financial analysis.

The following statements are true :
External analysis depends entirely on issued financial statements.
Interpretation and analysis both are different.
Financial analysis covers interpretation.

Cash balance is  (1,00,000 / 4,25,000) * 100 = 23.53% of total assets

Selling Expenses = (60,000 / 2,50,000) * 100 = 24% of Total Revenue

Common size statement express all items of financial statement as a percentage of some common base such as total assets for balance sheet

Revenue From Operations is used as base for preparation of common size statements of profit and loss.

Comparative statements are also called year-to-year change statements.