Which one has great potential-call option or put option?

Call options allow you to always buy the underlying stock at its strike price before expiration no matter what price the stock is in future and is therefore bought when the underlying stock is expected to go UP.

Put options allow you to always sell the underlying stock at its strike price before expiration no matter what price the stock is in future and is therefore bought when the underlying stock is expected to go DOWN.

As such, which one has greater potential depends on the prevailing market condition and your general outlook on the trend of the underlying stock. Generally, call options would have more appreciation potential in a bull market and put options would have more appreciation potential in a bear market.