Explanation:

Third Amendment Act, 1954: Empowered the Parliament to control the production, supply and distribution of the foodstuffs, cattle fodder, raw cotton, cotton seed and raw jute in the public interest.
Fifth Amendment Act, 1955: Empowered the president to fix the time-limit for the state legislatures to express their views on the proposed Central legislation affecting the areas, boundaries and names of the states.
Sixth Amendment Act, 1956: Included a new subject in the Union list i.e., taxes on the sale and purchase of goods in the course of inter-state trade and commerce and restricted the state’s power in this regard.
Seventh Amendment Act, 1956:
1. Abolished the existing classification of states into four categories i.e., Part A, Part B, Part C and Part D states, and reorganised them into 14 states and 6 union territories.
2. Extended the jurisdiction of high courts to union territories.
3. Provided for the establishment of a common high court for two or more states.
4. Provided for the appointment of additional and acting judges of the high court.

Hence, only 7th amendment act, 1956 deals with the linguistic recognization of states.