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For watermelon juice we need these ingredients.
Watermelon 1 cup (cut in cube)
Lemon juice 4 tbsp
lemon sliced 1
Red syrup 1 cup
Ice cube
Chilled water
Method
First blend the watermelon in blender make it fine paste.
Add chiled water in jug and add ice cube.
Add watermelon paste in jug mix it well and now add lemon slice and lemon juice with red syrup, mix it again and serve.