On Generic Parameters Naming. Which one is better?

1.cs

public interface IRestApiCallTasks<TRequest, THttpResult, TResult>
	{
		Task<string> BuildRequestUrlForRequestAsync( TRequest request );
		Task<THttpResult> SendRequestForUrlAsync( string requestUrl );
		Task<TResult> ParseResponseDataAsync(THttpResult httpData);
	}

2.cs

public interface IRestApiCallTasks<A, B, C>
	{
		Task<string> BuildRequestUrlForRequestAsync( A request );
		Task<B> SendRequestForUrlAsync( string requestUrl );
		Task<C> ParseResponseDataAsync(B httpData);
	}