Concept:
India has a coastline of about 7,516 km and possesses several important ports that facilitate international trade, transportation, and economic development. Ports are broadly classified as natural ports, artificial ports, and tidal ports depending upon their geographical and structural characteristics. Questions related to Indian ports generally test knowledge of their location, type, and specialization.
Step 1: Analyzing Statement (i): Kandla is a tidal port in Gujarat.
Kandla Port is situated in the Gulf of Kutch in the state of Gujarat. It was developed after Independence to reduce the pressure on Mumbai Port and to compensate for the loss of Karachi Port after partition.
Kandla is classified as a tidal port because the water level in the harbor changes significantly with tides. It is one of India's major ports handling petroleum, fertilizers, food grains, and other bulk cargo.
Therefore, statement (i) is correct.
Step 2: Analyzing Statement (ii): Mumbai is the biggest port with a spacious natural harbor.
Mumbai Port is one of the largest and busiest ports in India. It is located on the western coast and possesses a deep and spacious natural harbor, which provides excellent docking facilities for ships.
The natural harbor gives Mumbai a strategic advantage because ships can anchor safely without extensive artificial construction.
Thus, statement (ii) is also correct.
Step 3: Analyzing Statement (iii): Chennai is an artificial port on the east coast.
Chennai Port lies on the Coromandel Coast along the Bay of Bengal. Unlike Mumbai Port, it does not possess a naturally protected harbor.
Hence, extensive engineering structures such as breakwaters were constructed to create a safe harbor. Therefore, Chennai is regarded as an artificial port.
Thus, statement (iii) is correct.
Step 4: Analyzing Statement (iv): Paradip specializes in export of iron ore to America.
Paradip Port is located in Odisha and is well known for exporting iron ore. However, the major destinations of iron ore exported through Paradip are mainly Japan and East Asian countries, not America.
Hence, the statement becomes factually incorrect because of the incorrect export destination mentioned.
Therefore, statement (iv) is incorrect.
Step 5: Final conclusion.
Since statements (i), (ii), and (iii) are correct while statement (iv) is incorrect, the correct option is:
\[
\boxed{\text{(A) i, ii, iii are correct}}
\]