In case the value of intermediate goods is included during the estimation of the national product, the problem that will arise is the **Problem of Double Counting**.

1. Double counting occurs when the value of intermediate goods is counted more than once in the calculation of national income. Intermediate goods are those goods used in the production process of other goods and services.
2.  If their value is counted in addition to the final goods and services, it leads to an overestimation of the total national income.

    So, the correct option is:     (1) Problem of Double counting.