Assertion (A) : In India, every State has a High Court in its territory. Reason (R) : The Constitution of India provides for a High Court in each State.

The Reason (R) is true: the Constitution (Articles 214–231) provides for High Courts and Article 214 declares that there shall be a High Court for each State [1]. The Assertion (A) is false in practice because the Constitution and law also permit one High Court to serve two or more States or Territories. Parliament may establish a common High Court and several States share High Courts (for example, Punjab and Haryana share the Punjab & Haryana High Court at Chandigarh; the Gauhati High Court serves multiple north‑eastern States), so not every State necessarily has a High Court physically located within its territorial limits [2]. Thus R is true but A is false.

Sources

1. [1] Indian Polity, M. Laxmikanth(7th ed.) > Chapter 34: High Court > 34 ~ CHAPliER > p. 353
2. [2] https://dspmuranchi.ac.in/pdf/Blog/Powers-And-Functions-Of-High-Court-Polity.pdf