Step 1: Factors Affecting Development
The development of a country is not based solely on one factor. It is a multifaceted process influenced by various indicators, including per-capita income, literacy rates, and health conditions of the people.
Step 2: Understanding the Components of Development
- Per-capita Income: This reflects the economic well-being of individuals in the country. Higher per-capita income generally indicates a higher standard of living.
- Average Literacy Rate: Education is vital for the development of human resources and the overall economy.
- Health Condition of People: A healthy population is essential for economic productivity and overall social well-being.
Step 3: Why "Above All" is Correct
While each factor plays a significant role in development, it is the combination of all these aspects that determines the overall progress of a nation. Thus, the correct answer is Above all.
Thus, the correct answer is option (D) Above all.
$PQ$ is a chord of length $4\ \text{cm}$ of a circle of radius $2.5\ \text{cm}$. The tangents at $P$ and $Q$ intersect at a point $T$. Find the length of $TP$.