Pakistan day is observed on ?

A. Ghauri-1
B. Hataf
C. Abdali
D. Shaheen-1
The Ghauri–I official codename: Hatf–5 Ghauri–I) is a land-based surface-to-surface medium-range ballistic missile, in current service with the Pakistan Army’s Strategic Forces Command— a subordinate command of Strategic Plans Division.
Influenced from the design of Nodong-1 of North Korea, its extensive modification and engineering took place in Kahuta Research Laboratories (KRL) in 1990s with an objective of develog an electronic system that uses a single stage liquid fuel rocket motor to carry a payload of 700 kg to a range of 1,500 km. This is enough to reach most, if not all of India. Two variants of the Ghauri were produced under the secretive missile research programme started in 1987 and the development of a third variant was cancelled. The Ghauri-II uses increased motor assembly length and improved propellants for an increased range of 2,300 km (1,400 mi).
The missile is named after Shahabuddin Muhammad Ghauri, while the “Hatf” designation originates from the name of the sword or lance of the Islamic prophet Muhammad.
The Shaheen I is also designated Hatf-4. The Shaheen series of missiles are evidently based imported from China by the Pakistan Atomic Energy Commission’s National Development Complex.